The second line of defense against invading microbes includes
A. the skin.
B. mucous membranes.
C. antibodies.
D. phagocytic leukocytes.
E. microbiota.
Answer: D
You might also like to view...
During DNA replication, if the parent strand was ATTGCTA, the new daughter strand would be which of the following?
a. ATTGCTA b. ATGCAAT c. ATCGTTA d. TAACGAT
Which of the following is NOT true regarding
apoptosis? a. It is programmed cell death. b. It sculpts body parts. c. It primarily eliminates old, diseased cells. d. It involves cell self-destruction. e. The formation of the human hand is an example
The chromosomes are moving to opposite poles during
a. prophase. b. metaphase. c. interphase. d. anaphase. e. telophase.
Consider the figure illustrating the two major classes of hormones and their actions. Which class of hormones would you expect to be ideally suited for long-term processes such as growth and development?
A) protein hormones, because they can relay messages B) steroid hormones, because they can turn specific genes on or off C) protein hormones, because they cannot cross cell membranes D) steroid hormones, because they can diffuse across cell membranes